Height gauge



FIG. 1 is a top and right front perspective view of a height gaugeshowing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof.

The ornamental design for a height gauge, substantially as shown anddescribed.